San Antonio Weather Forecast

    • 40
    • 72

    Mostly Sunny

    • 38
    • 73

    Slight Chance Thunderstorms

    • 35
    • 71

    Slight Chance Thunderstorms

    • 36
    • 68

    Slight Chance Thunderstorms

    • 39
    • 72

    Partly Sunny

    • 39
    • 73

    Slight Chance Thunderstorms

Today 15 Sep Southern San Luis Valley

Sunny. Highs 68 to 74. Light Winds becoming southwest around 10 Mph in the afternoon.

Tonight 15 Sep Southern San Luis Valley

Partly cloudy. Lows 38 to 45. South Winds around 10 Mph.

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San Antonio Temperature Statistics

September Temperature

San Luis Valley Regional Airport (29.8 miles)

  • Lowest 9 September, 2025

    39 °F

  • Average September

    58.2 °F

  • Highest 2 September, 2025

    81 °F

Climate (2020–Present)

San Luis Valley Regional Airport (29.8 miles)

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  • Average Low 2020–2025

    26.4 °F

  • Average 2020–2025

    44.5 °F

  • Average High 2020–2025

    62.4 °F
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